I own all 3.

The TwinStar (GMS .32) is a twin trainer for smaller engines. Flies good, but not if you are used to high performance sport or 3D planes.

The Dual Ace (Evo .46) looks scale, takes a long time to put together and flies well. Does regular acro.

The Twin Stick(OS .46AX) flies like a Stick. Most fun of the 3, in my opinion. Does everything except for 3D. Flat spins and does great squares. Lands nicely. No bad habits that I see. I bought an extra one to have as a spare just in case...